摘要 |
The invention relates to a process for cleaning up waste waters containing uranium compounds, arsenic compounds and radium compounds, in particular mining waters, in which the uranium compound is separated off using a primary flocculation agent which is prepared by aminolysis of polyacrylonitrile with hydroxylamine, the following process steps being carried out sequentially: a) adjusting the pH of the waste water to < 6.2, b) precipitating out the radium compound with a 0.5 to 15 % strength barium chloride solution, c) precipitating out the uranium compound with 0.5 to 2 % strength solution of the primary flocculating agent, d) precipitating out the arsenic compound with a 0.5 to 45 % strength FeCl3 solution, e) separating off the precipitate. w
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申请人 |
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V., 80636 MUENCHEN, DE;HERBST UMWELTTECHNIK GMBH, 12207 BERLIN, DE |
发明人 |
GOHLKE, ULRICH, DR., 14478 POTSDAM, DE;OTTO, ANDREAS, DR., 14513 TELTOW, DE;SEIDEL, DIRK, DIPL.-ING., 12209 BERLIN, DE |